How do you reset the thermostat on a Robertshaw 9420?

How do you reset the thermostat on a Robertshaw 9420?

To reset the thermostat press the RESET button located just below the lower left corner of the display. Display shows CHECK Monitors system status. Call your local HVAC service provider.

Why is the screen on my thermostat blank?

When your screen is blank, it could indicate you need to replace the batteries. It that is the case, you typically need AA alkaline or 3-volt lithium batteries, but see what type is currently powering the thermostat and simply replace them. Most thermostats display a low-battery symbol when the juice is running low.

Why did my thermostat go blank?

If your thermostat is blank, the first thing you should do is check the batteries. Chances are, the batteries have died and the thermostat simply can’t power on. Replace the batteries and see if your thermostat turns on.

What does it mean when your thermostat goes blank?

How do I know if my thermostat battery is bad?

The most obvious sign that you need to change your thermostat batteries is when the thermostat literally tells you the batteries are about to die! Most programmable models will now flash a low battery warning, usually about a month or two before the battery completely dies.

Why is my thermostat blank?

Why did my carrier thermostat go blank?

What causes thermostat to lose power?

The power is out or a circuit breaker has tripped The power loss could also be the result of a tripped circuit breaker that powers the air conditioner or heater. Many thermostats run on low voltage sent from the transformer on the HVAC system; if the transformer loses power, so will the thermostat.

Why is my thermostat not getting power?

Check the house’s power supply. Inspect the circuit breaker and flip the breaker back, if it had tripped. If your thermostat has batteries, replace them. Make sure that the fuse inside the thermostat had not been blown.

  • October 7, 2022